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Thread: Unusual visual phenomenon with polarized lenses

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    Unusual visual phenomenon with polarized lenses

    So I purchased and mounted some aftermarket polarized lenses in some sunglasses of mine .. gray/brown base with full reflective blue mirror coating ..

    i noticed when i drive with the sun directly positioned in front of me there is a blueish hue on my black dashboard... when I tilt my head left or right it disappears... when I look move my head left or right it disappears.. when I drive in a different direction where the sun isn’t straight ahead it disappears..

    i also noticeed if I’m walking on black asphalt with the sun directly ahead and I look at the ground there again is a bluish color straight ahead on the ground but as soon as my head deviates away the blueish hue goes away..

    this also happens with some other sunglasses with a rose tint and polarized.. anybody have any ideas?
    Attached Thumbnails Attached Thumbnails C3AA39FE-6C10-4337-9282-A42935E6226A.jpg   197EE975-4B4E-426C-B2FD-C94DC1866C6B.jpg  

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    It's the combination of the polarization and blue mirror reflecting the light on certain angles. Backside AR will help to alleviate but not completely.

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    It is possible that they are off axis

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    I thought the mirror might have something to do with it but my secondary pair that is rose colored does not have a mirror coat...

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    Quote Originally Posted by rolandclaur View Post
    I thought the mirror might have something to do with it but my secondary pair that is rose colored does not have a mirror coat...
    And that other pair does the same thing?

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    The TV show "Nature" last night had a great episode about gemstones and why their colors vary.

    From google search this is why the Hope diamond is blue-

    It is blue to the naked eye because of trace amounts of boron within its crystal structure, and exhibits a red phosphorescence under exposure to ultraviolet light.

    Makes me wonder if, at the right sun angle, the red end of the spectrum is being affected through these lenses

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    One of the reasons I don't love polarized lenses.

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    Quote Originally Posted by fjpod View Post
    One of the reasons I don't love polarized lenses.
    Really doc? I don't doubt your opinion is reall but I LOVE really good polarized lenses, makes me feel like I have cyborg eyes or something.

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    Quote Originally Posted by Tallboy View Post
    And that other pair does the same thing?
    Yep.. I’ll try and take a pic through the lens to show you guys...

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    Quote Originally Posted by Tallboy View Post
    Really doc? I don't doubt your opinion is reall but I LOVE really good polarized lenses, makes me feel like I have cyborg eyes or something.
    Really. I will avoid wearing them.

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    Quote Originally Posted by fjpod View Post
    Really. I will avoid wearing them.
    I won't wear sunglasses that aren't polarized. Different strokes...
    I'm Andrew Hamm and I approve this message.

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    So let me get this straight. Asphalt and dash produce some blue effects through your polarized lenses, even the non-mirror. I am assuming that your dash is black as well. Black has a tendency of looking blue to those of us with color challenges. The glare produced by flat surfaces do not always reflect back at a perfect 90. Thus, when you tilt your head slightly, it goes away.
    You are most likely seeing the effects of stressed birefringence. Your lenses may be smidge big and/or the polarization may be a few degrees off the 180. Nothing to be overly concerned about IMHO.

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    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by lensmanmd View Post
    So let me get this straight. Asphalt and dash produce some blue effects through your polarized lenses, even the non-mirror. I am assuming that your dash is black as well. Black has a tendency of looking blue to those of us with color challenges. The glare produced by flat surfaces do not always reflect back at a perfect 90. Thus, when you tilt your head slightly, it goes away.
    You are most likely seeing the effects of stressed birefringence. Your lenses may be smidge big and/or the polarization may be a few degrees off the 180. Nothing to be overly concerned about IMHO.
    It's amazing how much trouble is caused by edging polarized lenses a touch too big.
    I'm Andrew Hamm and I approve this message.

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    Quote Originally Posted by rolandclaur View Post
    Yep.. I’ll try and take a pic through the lens to show you guys...
    Did you check the axis on them?

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